Merge branch 'main' into cuda11

Author: ahmadsharif1

.github/workflows/linux_cuda_wheel.yaml

@@ -82,20 +82,25 @@ jobs:
           name: pytorch_torchcodec__3.9_cu${{ env.cuda_version_without_periods }}_x86_64
           path: pytorch/torchcodec/dist/
       - name: Setup miniconda using test-infra
-        uses: ahmadsharif1/test-infra/.github/actions/setup-miniconda@14bc3c29f88d13b0237ab4ddf00aa409e45ade40
+        uses: pytorch/test-infra/.github/actions/setup-miniconda@main
         with:
           python-version: ${{ matrix.python-version }}
-          default-packages: "conda-forge::ffmpeg=${{ matrix.ffmpeg-version-for-tests }}"
+          #
+          # For some reason nvidia::libnpp=12.4 doesn't install but nvidia/label/cuda-12.4.0::libnpp does.
+          # So we use the latter convention for libnpp.
+          # We install conda packages at the start because otherwise conda may have conflicts with dependencies.
+          default-packages: "nvidia/label/cuda-${{ matrix.cuda-version }}.0::libnpp nvidia::cuda-nvrtc=${{ matrix.cuda-version }} nvidia::cuda-toolkit=${{ matrix.cuda-version }} nvidia::cuda-cudart=${{ matrix.cuda-version }} nvidia::cuda-driver-dev=${{ matrix.cuda-version }} conda-forge::ffmpeg=${{ matrix.ffmpeg-version-for-tests }}"
       - name: Check env
         run: |
           ${CONDA_RUN} env
           ${CONDA_RUN} conda info
           ${CONDA_RUN} nvidia-smi
+          ${CONDA_RUN} conda list
       - name: Update pip
         run: ${CONDA_RUN} python -m pip install --upgrade pip
       - name: Install PyTorch
         run: |
-          ${CONDA_RUN} python -m pip install --pre torch --index-url https://download.pytorch.org/whl/nightly/cu${{ env.cuda_version_without_periods }}
+          ${CONDA_RUN} python -m pip install --pre torch torchvision --index-url https://download.pytorch.org/whl/nightly/cu${{ env.cuda_version_without_periods }}
           ${CONDA_RUN} python -c 'import torch; print(f"{torch.__version__}"); print(f"{torch.__file__}"); print(f"{torch.cuda.is_available()=}")'
       - name: Install torchcodec from the wheel
         run: |
@@ -106,14 +111,8 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v3
 
-      - name: Install cuda runtime dependencies
-        run: |
-          # For some reason nvidia::libnpp=12.4 doesn't install but nvidia/label/cuda-12.4.0::libnpp does.
-          # So we use the latter convention for libnpp.
-          ${CONDA_RUN} conda install --yes nvidia/label/cuda-${{ matrix.cuda-version }}.0::libnpp nvidia::cuda-nvrtc=${{ matrix.cuda-version }} nvidia::cuda-toolkit=${{ matrix.cuda-version }} nvidia::cuda-cudart=${{ matrix.cuda-version }} nvidia::cuda-driver-dev=${{ matrix.cuda-version }}
       - name: Install test dependencies
         run: |
-          ${CONDA_RUN} python -m pip install --pre torchvision --index-url https://download.pytorch.org/whl/nightly/cpu
           # Ideally we would find a way to get those dependencies from pyproject.toml
           ${CONDA_RUN} python -m pip install numpy pytest pillow
 

README.md

@@ -65,7 +65,7 @@ decoder.get_frame_at(len(decoder) - 1)
 #   pts_seconds: 9.960000038146973
 #   duration_seconds: 0.03999999910593033
 
-decoder.get_frames_at(start=10, stop=30, step=5)
+decoder.get_frames_in_range(start=10, stop=30, step=5)
 # FrameBatch:
 #   data (shape): torch.Size([4, 3, 400, 640])
 #   pts_seconds: tensor([0.4000, 0.6000, 0.8000, 1.0000])

benchmarks/samplers/benchmark_samplers.py

@@ -16,16 +16,22 @@ def bench(f, *args, num_exp=100, warmup=0, **kwargs):
     for _ in range(warmup):
         f(*args, **kwargs)
 
+    num_frames = None
     times = []
     for _ in range(num_exp):
         start = perf_counter_ns()
-        f(*args, **kwargs)
+        clips = f(*args, **kwargs)
         end = perf_counter_ns()
         times.append(end - start)
-    return torch.tensor(times).float()
+        num_frames = (
+            clips.data.shape[0] * clips.data.shape[1]
+        )  # should be constant across calls
+    return torch.tensor(times).float(), num_frames
+
 
+def report_stats(times, num_frames, unit="ms"):
+    fps = num_frames * 1e9 / torch.median(times)
 
-def report_stats(times, unit="ms"):
     mul = {
         "ns": 1,
         "µs": 1e-3,
@@ -35,13 +41,13 @@ def report_stats(times, unit="ms"):
     times = times * mul
     std = times.std().item()
     med = times.median().item()
-    print(f"{med = :.2f}{unit} +- {std:.2f}")
-    return med
+    print(f"{med = :.2f}{unit} +- {std:.2f}  med fps = {fps:.1f}")
+    return med, fps
 
 
 def sample(sampler, **kwargs):
     decoder = VideoDecoder(VIDEO_PATH)
-    sampler(
+    return sampler(
         decoder,
         num_frames_per_clip=10,
         **kwargs,
@@ -56,34 +62,34 @@ def sample(sampler, **kwargs):
     print(f"{num_clips = }")
 
     print("clips_at_random_indices     ", end="")
-    times = bench(
+    times, num_frames = bench(
         sample, clips_at_random_indices, num_clips=num_clips, num_exp=NUM_EXP, warmup=2
     )
-    report_stats(times, unit="ms")
+    report_stats(times, num_frames, unit="ms")
 
     print("clips_at_regular_indices    ", end="")
-    times = bench(
+    times, num_frames = bench(
         sample, clips_at_regular_indices, num_clips=num_clips, num_exp=NUM_EXP, warmup=2
     )
-    report_stats(times, unit="ms")
+    report_stats(times, num_frames, unit="ms")
 
     print("clips_at_random_timestamps  ", end="")
-    times = bench(
+    times, num_frames = bench(
         sample,
         clips_at_random_timestamps,
         num_clips=num_clips,
         num_exp=NUM_EXP,
         warmup=2,
     )
-    report_stats(times, unit="ms")
+    report_stats(times, num_frames, unit="ms")
 
     print("clips_at_regular_timestamps ", end="")
     seconds_between_clip_starts = 13 / num_clips  # approximate. video is 13s long
-    times = bench(
+    times, num_frames = bench(
         sample,
         clips_at_regular_timestamps,
         seconds_between_clip_starts=seconds_between_clip_starts,
         num_exp=NUM_EXP,
         warmup=2,
     )
-    report_stats(times, unit="ms")
+    report_stats(times, num_frames, unit="ms")

examples/basic_example.py

@@ -120,7 +120,7 @@ def plot(frames: torch.Tensor, title : Optional[str] = None):
 # their :term:`pts` (Presentation Time Stamp), and their duration.
 # This can be achieved using the
 # :meth:`~torchcodec.decoders.VideoDecoder.get_frame_at` and
-# :meth:`~torchcodec.decoders.VideoDecoder.get_frames_at`  methods, which
+# :meth:`~torchcodec.decoders.VideoDecoder.get_frames_in_range`  methods, which
 # will return a :class:`~torchcodec.Frame` and
 # :class:`~torchcodec.FrameBatch` objects respectively.
 
@@ -129,7 +129,7 @@ def plot(frames: torch.Tensor, title : Optional[str] = None):
 print(last_frame)
 
 # %%
-middle_frames = decoder.get_frames_at(start=10, stop=20, step=2)
+middle_frames = decoder.get_frames_in_range(start=10, stop=20, step=2)
 print(f"{type(middle_frames) = }")
 print(middle_frames)
 
@@ -152,7 +152,7 @@ def plot(frames: torch.Tensor, title : Optional[str] = None):
 # So far, we have retrieved frames based on their index. We can also retrieve
 # frames based on *when* they are displayed with
 # :meth:`~torchcodec.decoders.VideoDecoder.get_frame_displayed_at` and
-# :meth:`~torchcodec.decoders.VideoDecoder.get_frames_displayed_at`, which
+# :meth:`~torchcodec.decoders.VideoDecoder.get_frames_displayed_in_range`, which
 # also returns :class:`~torchcodec.Frame` and :class:`~torchcodec.FrameBatch`
 # respectively.
 
@@ -161,7 +161,7 @@ def plot(frames: torch.Tensor, title : Optional[str] = None):
 print(frame_at_2_seconds)
 
 # %%
-first_two_seconds = decoder.get_frames_displayed_at(
+first_two_seconds = decoder.get_frames_displayed_in_range(
     start_seconds=0,
     stop_seconds=2,
 )

src/torchcodec/decoders/_video_decoder.py

@@ -181,7 +181,7 @@ def get_frame_at(self, index: int) -> Frame:
             duration_seconds=duration_seconds.item(),
         )
 
-    def get_frames_at(self, start: int, stop: int, step: int = 1) -> FrameBatch:
+    def get_frames_in_range(self, start: int, stop: int, step: int = 1) -> FrameBatch:
         """Return multiple frames at the given index range.
 
         Frames are in [start, stop).
@@ -238,7 +238,7 @@ def get_frame_displayed_at(self, seconds: float) -> Frame:
             duration_seconds=duration_seconds.item(),
         )
 
-    def get_frames_displayed_at(
+    def get_frames_displayed_in_range(
         self, start_seconds: float, stop_seconds: float
     ) -> FrameBatch:
         """Returns multiple frames in the given range.

src/torchcodec/samplers/_time_based.py

@@ -71,7 +71,7 @@ def _validate_sampling_range_time_based(
     if sampling_range_start is None:
         sampling_range_start = begin_stream_seconds
     else:
-        if sampling_range_start <= begin_stream_seconds:
+        if sampling_range_start < begin_stream_seconds:
             raise ValueError(
                 f"sampling_range_start ({sampling_range_start}) must be at least {begin_stream_seconds}"
             )

test/decoders/test_video_decoder.py

@@ -366,14 +366,14 @@ def test_get_frame_displayed_at_fails(self):
             frame = decoder.get_frame_displayed_at(100.0)  # noqa
 
     @pytest.mark.parametrize("stream_index", [0, 3, None])
-    def test_get_frames_at(self, stream_index):
+    def test_get_frames_in_range(self, stream_index):
         decoder = VideoDecoder(NASA_VIDEO.path, stream_index=stream_index)
 
         # test degenerate case where we only actually get 1 frame
         ref_frames9 = NASA_VIDEO.get_frame_data_by_range(
             start=9, stop=10, stream_index=stream_index
         )
-        frames9 = decoder.get_frames_at(start=9, stop=10)
+        frames9 = decoder.get_frames_in_range(start=9, stop=10)
 
         assert_tensor_equal(ref_frames9, frames9.data)
         assert frames9.pts_seconds[0].item() == pytest.approx(
@@ -389,7 +389,7 @@ def test_get_frames_at(self, stream_index):
         ref_frames0_9 = NASA_VIDEO.get_frame_data_by_range(
             start=0, stop=10, stream_index=stream_index
         )
-        frames0_9 = decoder.get_frames_at(start=0, stop=10)
+        frames0_9 = decoder.get_frames_in_range(start=0, stop=10)
         assert frames0_9.data.shape == torch.Size(
             [
                 10,
@@ -412,7 +412,7 @@ def test_get_frames_at(self, stream_index):
         ref_frames0_8_2 = NASA_VIDEO.get_frame_data_by_range(
             start=0, stop=10, step=2, stream_index=stream_index
         )
-        frames0_8_2 = decoder.get_frames_at(start=0, stop=10, step=2)
+        frames0_8_2 = decoder.get_frames_in_range(start=0, stop=10, step=2)
         assert frames0_8_2.data.shape == torch.Size(
             [
                 5,
@@ -434,13 +434,13 @@ def test_get_frames_at(self, stream_index):
         )
 
         # test numpy.int64 for indices
-        frames0_8_2 = decoder.get_frames_at(
+        frames0_8_2 = decoder.get_frames_in_range(
             start=numpy.int64(0), stop=numpy.int64(10), step=numpy.int64(2)
         )
         assert_tensor_equal(ref_frames0_8_2, frames0_8_2.data)
 
         # an empty range is valid!
-        empty_frames = decoder.get_frames_at(5, 5)
+        empty_frames = decoder.get_frames_in_range(5, 5)
         assert_tensor_equal(
             empty_frames.data,
             NASA_VIDEO.get_empty_chw_tensor(stream_index=stream_index),
@@ -456,10 +456,10 @@ def test_get_frames_at(self, stream_index):
         (
             lambda decoder: decoder[0],
             lambda decoder: decoder.get_frame_at(0).data,
-            lambda decoder: decoder.get_frames_at(0, 4).data,
+            lambda decoder: decoder.get_frames_in_range(0, 4).data,
             lambda decoder: decoder.get_frame_displayed_at(0).data,
             # TODO: uncomment once D60001893 lands
-            # lambda decoder: decoder.get_frames_displayed_at(0, 1).data,
+            # lambda decoder: decoder.get_frames_displayed_in_range(0, 1).data,
         ),
     )
     def test_dimension_order(self, dimension_order, frame_getter):
@@ -487,7 +487,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         decoder = VideoDecoder(NASA_VIDEO.path, stream_index=stream_index)
 
         # Note that we are comparing the results of VideoDecoder's method:
-        #   get_frames_displayed_at()
+        #   get_frames_displayed_in_range()
         # With the testing framework's method:
         #   get_frame_data_by_range()
         # That is, we are testing the correctness of a pts-based range against an index-
@@ -504,7 +504,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         # value for frame 5 that we have access to on the Python side is slightly less than the pts
         # value on the C++ side. This test still produces the correct result because a slightly
         # less value still falls into the correct window.
-        frames0_4 = decoder.get_frames_displayed_at(
+        frames0_4 = decoder.get_frames_displayed_in_range(
             decoder.get_frame_at(0).pts_seconds, decoder.get_frame_at(5).pts_seconds
         )
         assert_tensor_equal(
@@ -513,15 +513,15 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         )
 
         # Range where the stop seconds is about halfway between pts values for two frames.
-        also_frames0_4 = decoder.get_frames_displayed_at(
+        also_frames0_4 = decoder.get_frames_displayed_in_range(
             decoder.get_frame_at(0).pts_seconds,
             decoder.get_frame_at(4).pts_seconds + HALF_DURATION,
         )
         assert_tensor_equal(also_frames0_4.data, frames0_4.data)
 
         # Again, the intention here is to provide the exact values we care about. In practice, our
         # pts values are slightly smaller, so we nudge the start upwards.
-        frames5_9 = decoder.get_frames_displayed_at(
+        frames5_9 = decoder.get_frames_displayed_in_range(
             decoder.get_frame_at(5).pts_seconds,
             decoder.get_frame_at(10).pts_seconds,
         )
@@ -533,7 +533,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         # Range where we provide start_seconds and stop_seconds that are different, but
         # also should land in the same window of time between two frame's pts values. As
         # a result, we should only get back one frame.
-        frame6 = decoder.get_frames_displayed_at(
+        frame6 = decoder.get_frames_displayed_in_range(
             decoder.get_frame_at(6).pts_seconds,
             decoder.get_frame_at(6).pts_seconds + HALF_DURATION,
         )
@@ -543,7 +543,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         )
 
         # Very small range that falls in the same frame.
-        frame35 = decoder.get_frames_displayed_at(
+        frame35 = decoder.get_frames_displayed_in_range(
             decoder.get_frame_at(35).pts_seconds,
             decoder.get_frame_at(35).pts_seconds + 1e-10,
         )
@@ -555,7 +555,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         # Single frame where the start seconds is before frame i's pts, and the stop is
         # after frame i's pts, but before frame i+1's pts. In that scenario, we expect
         # to see frames i-1 and i.
-        frames7_8 = decoder.get_frames_displayed_at(
+        frames7_8 = decoder.get_frames_displayed_in_range(
             NASA_VIDEO.get_frame_info(8, stream_index=stream_index).pts_seconds
             - HALF_DURATION,
             NASA_VIDEO.get_frame_info(8, stream_index=stream_index).pts_seconds
@@ -567,7 +567,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         )
 
         # Start and stop seconds are the same value, which should not return a frame.
-        empty_frame = decoder.get_frames_displayed_at(
+        empty_frame = decoder.get_frames_displayed_in_range(
             NASA_VIDEO.get_frame_info(4, stream_index=stream_index).pts_seconds,
             NASA_VIDEO.get_frame_info(4, stream_index=stream_index).pts_seconds,
         )
@@ -583,7 +583,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
         )
 
         # Start and stop seconds land within the first frame.
-        frame0 = decoder.get_frames_displayed_at(
+        frame0 = decoder.get_frames_displayed_in_range(
             NASA_VIDEO.get_frame_info(0, stream_index=stream_index).pts_seconds,
             NASA_VIDEO.get_frame_info(0, stream_index=stream_index).pts_seconds
             + HALF_DURATION,
@@ -595,7 +595,7 @@ def test_get_frames_by_pts_in_range(self, stream_index):
 
         # We should be able to get all frames by giving the beginning and ending time
         # for the stream.
-        all_frames = decoder.get_frames_displayed_at(
+        all_frames = decoder.get_frames_displayed_in_range(
             decoder.metadata.begin_stream_seconds, decoder.metadata.end_stream_seconds
         )
         assert_tensor_equal(all_frames.data, decoder[:])
@@ -604,13 +604,13 @@ def test_get_frames_by_pts_in_range_fails(self):
         decoder = VideoDecoder(NASA_VIDEO.path)
 
         with pytest.raises(ValueError, match="Invalid start seconds"):
-            frame = decoder.get_frames_displayed_at(100.0, 1.0)  # noqa
+            frame = decoder.get_frames_displayed_in_range(100.0, 1.0)  # noqa
 
         with pytest.raises(ValueError, match="Invalid start seconds"):
-            frame = decoder.get_frames_displayed_at(20, 23)  # noqa
+            frame = decoder.get_frames_displayed_in_range(20, 23)  # noqa
 
         with pytest.raises(ValueError, match="Invalid stop seconds"):
-            frame = decoder.get_frames_displayed_at(0, 23)  # noqa
+            frame = decoder.get_frames_displayed_in_range(0, 23)  # noqa
 
 
 if __name__ == "__main__":